Coffee concentrate and proces of making same.



-'UNrrEn STATES Tatented August 11,

PATENT OFFICE,

SATORI KATO, OF-OHIOAGO, ILLINOIS, ASSIGNOR. TO KATO COFFEE COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

" COFFEE CONCENTRATE ANIDPIIRO'C'ES'S OF MAKING, SAME, I

SPECIFICATION forming as of' Letters Yatent No. 735,777, dated August 11, 1903.

application m April 11, 1901.

To all whom it may concern:

Be it known that I, SATORI KATO, a subject of the Emperor of Japan, residing at Chicago, in they county of Cook and State of. Illinois, have invented certain new and useful Improvements in Coffee Concentrate and Process of Making Same, of which the'foll'owing is a specification. p i This invention relates more particularly to lo the production in a hard dry state of a coffee concentrate which is not liable to become rancid and which does not owe its resistance .to rancidity nor its dryv hard state to the presence therein of foreign-matter or fiber, but which may consist entirely of the arogratin, andliealthfulconstituents of the coffeea can.

In accordance with the invention the'volatile oil of the coffee is mixed with the solid 2 aqueous extract, but I have discovered that an attempt to efiect thiswithout other pre'- caution results in the production of a pasty sticky mass which does not resist rancidity, but quickly spoils under the usual conditions 2 5 of transportation and storage. I have further discovered that the difliculty arises from the presence in the concentrate of the nonvolatile cofioe-fat or at any rate is overcome by its removal, which, I believe, I am the first to eifect;

In the practice of my invention I separate the volatile oil and the fatsfrom the coffee I, and remove the fiber and reduce the residue to a hard substance. This hard substance is reduced to a finely-dividedcondition and a portion thereof is pulverized and thoroughly mixed with the pure volatile oil and dried, after which this mixture is mixed with the remainder of the hard substance and used in I 0 this granulated or flaky form or pressed into tablets. V

The specific process employed may be described. as follows: I first roast and reduce the coffee to a finely-divided condition by- 5 grinding or pulverizing and then subject it to heavy pressure to remove the fats, after which the volatile oil is separated from the oofiee by distillation. The residue remaining after the removal of the volatile oil is diluted with hot water and allowed to cool," after which it is thoroughly agitated to cause Serial No.58 ,2 14. (Specimens-l I whatever fats remain therein to collect at the top, so that they can be readily skimmed off. The residue is then filtered to remove the fiber, after which the residue consists, es- 5, sentially, of caffetannic acid, the nutrient substances, coloring matter, and cafiein. This residue is then boiled and. thoroughly stirred or agitated during the boilingopera-I tion until all moisture has been evaporated and the mass is reduced to a hard substance. This hard substance is then granulated in a suitable manner, and a portion thereof-say one-fourth of the quantityis pulverized and mixed with the volatile oil. This mixture is ,6; spread on ahard, dry, smooth surface, such as glass or porcelain, and dried in a temperature above. freezing-point, and preferably below 40 Fahrenheit to retain the aroma, the drying being readily accomplished by circu- 1o lating air-currents over the mixture; The.

dry mixture of pulverized hard substanceand volatile oil is then removed from the drying surface and mixed with the remainder of the granulated hard substance, and the 7 5 coffee concentrate is then obtained in a commercial form which will retain its aroma and all the other desirable properties of the coifeebeans'and can be used in this finely-divided condition or pressed 1 into tablets or other form, The coffee concentrate thus obtained embodies all of the pleasant and desirable properties of cofiee-beans, in a perfectly-pure V and unadulterated state and entirely free from the unpleasant and insoluble constituents, and this concentrate will preserve its aroma indefinitely. s I By following the process herein described it will be observed thatl obtain the volatile oil of the coffee-beans in a perfectly-pure state and entirely free from fats and also remove the fiber, leaving a residue which is reduced to a hard substance by evaporation; The pure volatile oil is then mixed with a comparatively small portion of this hard 'sub- 5 stance in order that'it may become thoroughly 7 vabsorbed thereby, and when this is dried and mixed with the remainder of the hard substance .the entirequantity of the hard substance becomes thoroughly impregnated withthe-volatile oil, and the product consists of the soluble constituents of coffee-beans in a him all of the aromatic and desirable prop:

erties of the codes in my concentrate and remove the fats and fibrous matter I thereby largely increase the quantity of drinking-coffee obtainable from a given quantity of cot fee beans.

Pl hard residue and pulverizinga portion thereof;

mixing said pulverized portion of the hard Having thus fullydescribed my invention, what I claim as new, and desire to secure by Letters Patent, is-

.1. A dry and hard rancidity-resisting coffee concentrate composed of a fat-freed aqueous'extract and volatile oil of coflfee, substantially as described. a

2; The herein-described process of producing coflfee concentrate, which consists in separating the volatile oil, fats and fibrous matter from the roasted cofiee and reducing the residue to a dry, hard state; 'granulating said residue and the volatile oil and drying same in a low temperature; and then mixing the dried mixture of. pulverized, hard substance and volatile oil with the remainder. of the granulated, hard substance. I Y

3. The herein-described process of producing coffee concentrate, which consists in roasting and reducing coffee-beans to a finelydivided condition and removing the fats; separating the volatile oil irom thecoflee by distillation; separating the fiber from the coflee,

after the volatile oil and fats have been removed, andreducing the residue to a hard,

solid substance byevaporation,and granulating the same; pulverizing a portion of this 4 as described.

granulatedfhard'substance and mixing this pulverized portion with the volatile oil; .dry-

ing said mixture on asmooth, hard surface ina 7 low temperature; removing the mixture from 1 the drying-surface and mixing it with the remainder of the granulated, hard substance.

4; The herein-described process of producing, cofiee concentrate, which consists in roasting and reducing'coflfee-beans to a fiuely- 1 divided condition, and subjecting them to heavy pressure to remove the fats; then separating the volatile oil, and the fiber from the cofiee and reducing the residue to a dry, hard state; grauulating the hard residue and pulverizin g a portion thereof and mixing said pulverized portion with the volatile oil; dry-1 ing said mixture on a smooth, hard surface in? a low temperature above freezing; and then mixing said dried mixture of pulverized residue and volatile oil with the remaining gran.- ulatedresidue. v

5. A .dry and hard fiberless rancidity-resistin'g cofiee tablet composed of a compressed mass of a fat-freed aqueous extract and volatileoil of cofiee, substantially as described. 6. The process of producing cofiee concentrate, by separating from the cofiee a fat-freed aqueous extract and a volatile oil, evaporating the extract, inixing the 'solid extract and' the oil, and drying the mixture, substantially as described.

7. The process of producing tablets of 00f.-

, fee concentrate, by separating from the coffee a fat-freed aqueous extract and avolatile oil,-filtering the extract, evaporating the filtered extract, mixing the solidextract and the oil, drying the mixture, and compressing the dried product into tablets, substantially 8. A dry and hard rancidity-resisting coffee "concentrate containing a fat-freed j SATORI KATO. Witnesses: Y WI. 0. Baur,

KATHRYN McLAsnN.

q e- 'ousextract of coffee, substantially. de- .scribed. 

